NTSB Identification: CHI85LA275.
The docket is stored on NTSB microfiche number 30343.
Accident occurred Saturday, July 06, 1985 in DONALDSON, MN
Aircraft: BELL 47G-3B-1, registration: N7856S
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
WHEN THE PLT APPLIED PWR TO LEVEL OFF WHILE ENTERING A SPRAY THE ENG DID NOT PRODUCE SUFFICIENT PWR TO STOP THE DESCENT.HE ATTEMPTED A RUN ON LANDING BUT THE UNEVEN TERRAIN CAUSED SUBSTANTIAL DAMAGE TO THE HELICOPTER. INSPECTION OF THE ENG REVEALED THE ACTUATING ROD FOR THE ACTUATOR TO THE WASTEGATE OF THE TURBOCHARGER WAS FROZEN TO THE HOUSING OF THE UNIT.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:ENG ASSEMBLY,BLOWER/IMPELLER/INTEGRAL SUPERCHARGER..FAILURE,PARTIAL
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